CN115411517B - Broadband directional panel antenna of crab pincer-shaped vibrator - Google Patents
Broadband directional panel antenna of crab pincer-shaped vibrator Download PDFInfo
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- 238000005452 bending Methods 0.000 claims abstract description 56
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- 239000002184 metal Substances 0.000 claims abstract description 14
- 230000008878 coupling Effects 0.000 claims abstract description 7
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- 238000004891 communication Methods 0.000 description 8
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- 238000004088 simulation Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
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- 230000009466 transformation Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
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- 239000008186 active pharmaceutical agent Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
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Abstract
The application discloses a broadband directional panel antenna of crab claw-shaped vibrator, which mainly comprises a crab claw-shaped vibrator printing plate, a feed balun component, an arched bending reflecting plate, a parasitic unit supporting column, a tuning column and the like. The crab claw-shaped vibrator printing plate is provided with two vibrator sheets with outward crab claw directions; the feed balun component is a 1/4 wavelength short circuit feed structure and comprises a feed coaxial line component, a short circuit branch and a feed piece; the bow-shaped bending transmitting plate is of a structure with a concave middle part and two vertical bending sides, and a metal tuning column arranged on the bow-shaped bending transmitting plate penetrates through the crab claw vibrator. According to the invention, a double electromagnetic coupling structure is formed between the crab claw-shaped vibrator and the bending edge of the arched bending reflecting plate and between the vibrator and the tuning post, and impedance matching can be adjusted through gaps, positions, sizes and the like. The method and the device greatly improve the impedance bandwidth of the broadband directional panel antenna and improve the gain and the evenness of the beam width.
Description
Technical Field
The present invention relates to a directional antenna for a communication system or a communication signal detection and interference system, and more particularly, to an ultra wideband planar directional antenna.
Background
The directional antenna has wide application in various communication systems, and has the advantages that the good directivity ensures that the gain of the antenna is high enough, and the energy can be concentrated in a certain beam angle, so that the communication with a longer distance is realized. A directional antenna with high gain is commonly used as a communication receiving and transmitting antenna in a communication system to improve the communication distance; wideband directional antennas are commonly used in communication detection and interference systems to simultaneously extend the bandwidth of their reception and transmission and to increase the detection and interference distance.
With the development of radio technology, the processing bandwidth of the rear-end receiver is wider and wider, and the corresponding working bandwidth of the required antenna is increased. Although the logarithmic period antenna and the Vivaldi antenna can achieve bandwidths better than 5:1, the size of the antenna is larger, and the adaptability of a plurality of platform carriers is affected; microstrip antennas have a low profile but their bandwidth is generally narrow and cannot be applied to such broadband systems. The directional flat dipole antenna has a relatively balanced effect in terms of the section size and the bandwidth, and Tu Z, zhou D F and Zhang G Q are IEEE Antennas Wireless Propag Lett and 2013;12:1610-1613 paper A wideband cavity-Backed elliptical printed dipole antenna with enhanced radiation patterns proposes an elliptical printed dipole antenna with a back cavity that achieves an impedance bandwidth of 129% (VSWR < 2), but a sharp drop in high frequency beamwidth, with the H-plane being narrowest less than 30 °; he Xiao, feng, zhang Zetao, science and engineering, 2015,15 (17): wide bandwidth beam printed dipole antenna for spectrum monitoring published in 1671-1815, uses a narrow reflector dipole plus director approach to increase the beam width of the H-plane pattern, but its bandwidth is narrowed to 96% and in-band VSWR rises to a maximum of 2.7. There is room for improvement in ultra wideband and in-band beamwidth performance, etc., from a combination of the properties of the wideband directional patch antennas given in the references.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a broadband directional panel antenna based on a crab claw vibrator, which aims to improve the impedance bandwidth of the antenna and improve the in-band beam width performance under the condition of not changing the section height.
In order to solve the above problems, the present application provides a broadband directional panel antenna based on crab claw-shaped vibrator, comprising: crab claw-shaped vibrator printing plate, feed balun component, bow-shaped bending reflecting plate, parasitic unit support column and tuning column. The crab claw-shaped vibrator printing plate is a printed PCB, two vibrator plates with outward crab claw directions are printed on the printed PCB, triangular cutting angles are arranged at the positions, close to the center, of each crab claw-shaped vibrator, and the two crab claw-shaped vibrators are symmetrical about the center of the antenna axis and keep a certain gap; the feed balun component comprises a feed coaxial component, a short circuit branch knot and a feed sheet, wherein the feed coaxial component is a cable component with a radio frequency cable, the short circuit is a short circuit line directly, and the feed sheet is positioned above the crab claw-shaped vibrator printing plate and is used for connecting the short circuit branch knot with the tail end of the feed coaxial component; the starting end of the feed coaxial assembly is a radio frequency connector, the tail end of the feed coaxial assembly passes through the arched bending reflecting plate and then passes through the crab-claw-shaped vibrator printing plate again, and the outer conductor of the coaxial wire is electrically connected with a crab-claw-shaped vibrator; the short circuit branch is electrically connected with the arched bending reflecting plate and the other crab claw-shaped vibrator of the crab claw-shaped vibrator; one side of the feed piece is electrically connected with the tail end of the short circuit branch knot, and one side of the zero position is electrically connected with the tail end core wire of the feed coaxial assembly. The arched bending reflecting plate is a bending metal plate, the bottom of the arched bending reflecting plate is of a convex structure, and the folded edges at two sides are vertical to the bottom surface; the bottom bulge structure of the arched bending reflecting plate is provided with a feeding coaxial assembly of a feeding balun assembly and a short circuit branch knot, the horizontal transition part is provided with a tuning column, and the vertical flanging parts at two sides support the crab claw vibrator printing plate; the parasitic unit is a rectangular metal plate, is positioned right above the crab claw vibrator printing plate and is fixed on the crab claw vibrator printing plate through a parasitic unit support column; the parasitic unit support columns are 4 nonmetallic cylinders which are arranged on the crab claw vibrator printing plate and are used for fixing and supporting the parasitic units; the tuning column is a 2 metal columns which are positioned between the arched bending reflecting plate and the crab claw vibrator printing plate, the bottom of the tuning column is pressed on the horizontal transition section of the arched bending reflecting plate, and the crab claw vibrator printing plate is supported at the top of the tuning column.
The broadband directional panel antenna integrates the methods of the arched reflecting bottom plate structure, the crab claw-shaped vibrator structure, the chamfer angles of adjacent positions of the dipoles, the loading of the center position of the crab claw concave to the ground resonance column structure and the like on the basis of the broadband dipole panel antenna with the parasitic unit, so that the bandwidth of the directional panel antenna is improved, and meanwhile, the beam width of the high-frequency position is improved. The arc-shaped reflecting bottom plate structure is combined with the radiating oscillator, the vertical bending part of the arc-shaped reflecting bottom plate is coupled with the tail end of the radiating oscillator, impedance matching of a low frequency band is achieved, step transformation of vertical distance between the middle protruding part of the arc-shaped reflecting bottom plate and the radiator is used for improving impedance characteristics of the high frequency band and expanding beam width of a high frequency directional diagram, and the protruding part has better impedance matching effect if arc section transformation is adopted. The crab claw-shaped vibrator structure is characterized in that the edge of the crab claw-shaped vibrator structure is curved on the basis of a conventional rectangular vibrator, an elliptical cutting mode of the upper offset edge position of the vibrator is adopted to form a crab claw shape and is used for controlling electromagnetic coupling of a part which is perpendicularly bent with the edge of an arched reflecting bottom plate to achieve low-frequency impedance matching, the elliptical left-right movement is cut to adjust the coupling degree, and therefore the balance between the frequency position of a low-frequency first resonant frequency point and the impedance matching degree is considered, namely, if the frequency position of the first resonant frequency point is shifted towards the low frequency, the corresponding voltage standing wave ratio is higher, and if the frequency position of the first resonant frequency point is shifted towards the high frequency, the corresponding voltage standing wave ratio is lower. The cutting angles of adjacent positions of the symmetrical dipole structures of the crab claw-shaped dipole structures are used for improving impedance matching characteristics of high frequency bands, so that the antenna obtains better voltage standing wave ratio. And a resonant column structure is arranged between the arched reflecting bottom plate structure and the crab claw-shaped vibrator structure, the bottom of the resonant column structure is vertical to the installation plane of the bottom plate and is electrically connected with the bottom plate, and the top of the resonant column structure is positioned near the center of the cutting ellipse of the crab claw-shaped vibrator and is used for adjusting the impedance characteristic of the low-frequency second resonant frequency point and improving the voltage standing wave ratio characteristic near the second resonant point.
Further, the tail end of the crab claw-shaped vibrator on the crab claw-shaped vibrator printing plate is only adjacent to the bending vertical part of the arched bending reflecting plate, an electromagnetic coupling structure is formed, a double-resonance structure corresponding to a low-frequency part is formed by the electromagnetic coupling structure and a tuning column loaded to the ground at the cutting-off elliptical central position of the crab claw-shaped vibrator, and broadband impedance matching near the low frequency can be combined and adjusted by adjusting the gap between the tail end of the crab claw-shaped vibrator and the bending vertical part of the arched bending reflecting plate, the central position of the cutting-off elliptical part, the diameter and the position of the tuning column and the like;
further, the concave shape of the middle crab claw of the printed crab claw-shaped vibrator is obtained by cutting a thick ellipse, and the equation expression is as follows:
wherein, (x) 0 ，y 0 ) Is the coordinates of the point A at the center of the ellipse, which typically holds y 0 =0 so that the center point is located on the center symmetry line of the monolithic printed crab claw vibrator, passing through x 0 The value change of (2) enables the ellipse to be cut to move left and right; a is the axial length of the ellipse in the x-axis direction, and b is the axial length of the ellipse in the y-axis direction.
Further, the two sides of the crab claw-shaped vibrator printing plate are lapped on the bending vertical parts of the arched bending reflecting plate, the two sides of the printing plate are supported by the bending vertical parts, and the printing plate is also supported by the parts such as the feed balun component, the tuning post and the like at the middle part, so that the crab claw-shaped vibrator printing plate has a stable structure.
Further, the vertical distance D1 from the center of the crab claw vibrator printing plate to the bottom of the arched bending reflecting plate is smaller than the vertical distance D2 from the center of the crab claw vibrator printing plate to the horizontal transition part, the center of the crab claw vibrator printing plate corresponds to the high-frequency part of the dipole antenna constructed by the crab claw vibrator pair, the corresponding wavelength is shorter, and the D1 with smaller distance between the crab claw vibrator printing plate and the bottom plate is also matched; the two sides of the crab claw-shaped vibrator printing plate correspond to the low-frequency part of the dipole antenna constructed by the crab claw-shaped vibrator pair, the corresponding wavelength is longer, and the D2 with larger interval between the crab claw-shaped vibrator printing plate and the bottom plate is also matched. Compared with a flat plate-shaped reflecting plate, the adoption of the arched bending reflecting plate is more beneficial to improving the impedance of the high-frequency part for the distance D1, and the distance D1 of the high-frequency part is closer to 1/4 of the resonance wavelength of the high-frequency part, so that the improvement of the beam width of the high-frequency part in the widening direction is also facilitated.
Further, symmetrically distributed first and second crab claw-shaped vibrators on the crab claw vibrator printing plate are balanced fed by the feed balun component. The feed balun component is arranged on the arched reflecting bottom plate, and a 1/4 wavelength short-circuit branch of the feed balun component is electrically connected with the bottom plate, penetrates through the first crab claw vibrator and is electrically connected with the first crab claw vibrator; the outer conductor of the coaxial line of the feed coaxial assembly is electrically connected with the bottom plate, the feed coaxial assembly penetrates through the second crab claw-shaped vibrator, and the outer conductor of the feed coaxial assembly is electrically connected with the second crab claw-shaped vibrator; two ends of the feed piece are respectively connected with a core wire of the feed coaxial assembly and the top end of the 1/4 wavelength short circuit branch; the core wire and the coaxial outer conductor of the feed coaxial assembly form 0-180 DEG feed to the two crab claw vibrators, and the feed position of the first crab claw vibrator is short-circuited with the ground through the short-circuit branch, so that a balanced feed structure is formed, and the defects of deflection of an antenna radiation pattern and the like caused by unbalanced current of the coaxial wire part of the feed coaxial assembly are avoided;
further, the coaxial line portion of the feed coaxial assembly has a characteristic impedance of 50 ohms. The 50 ohm is the characteristic impedance of a common coaxial line, i.e. the input port impedance. The coaxial line with different characteristic impedance can be selected, and the characteristic impedance of the antenna and the input port can be subjected to impedance matching by adjusting the structure of the antenna.
The technical effects achieved by the present application are shown in the following aspects.
Firstly, electromagnetic coupling between the tail end of the crab claw-shaped vibrator and the bending vertical part of the arched bending reflecting plate is designed to reduce the resonance frequency of a low-frequency first resonance point, and the voltage standing wave ratio of the first resonance point with the lowest frequency to the first resonance point is comprehensively obtained by adjusting the spacing parameter of the crab claw-shaped vibrator and the bending vertical part of the arched bending reflecting plate and the position parameter of the cutting ellipse, so that a better comprehensive impedance matching effect is obtained;
secondly, a grounded loading resonance column is designed, and a low-frequency second resonance point adjusting function is formed by passing through the vicinity of the center of an elliptical cutting part on the crab claw vibrator, and the low-frequency second resonance point adjusting function can be matched with tuning of the first resonance point to obtain a better broadband impedance matching effect;
thirdly, an arched bending reflecting plate is designed, the space between the radiating oscillator capable of being subjected to step transformation and the bottom plate is constructed, the impedance matching characteristic of the high-frequency end is improved, the impedance matching of the high-frequency end is greatly increased, and meanwhile, the beam width of the high-frequency end is widened.
Simulation shows that the in-band standing wave ratio of the crab claw vibrator broadband directional panel antenna provided by the application at 0.6GHz to 4.2GHz (7:1 octaves, and the relative bandwidth is 150%) is less than 2.5; in-band gain at 0.6-3.3 GHz (5.5:1 octave, relative bandwidth is 138.5%) is between 4-8 dBi, the in-band directional diagram has no lobe, and the width of the H-plane wave beam in the bandwidth range with gain more than or equal to 4dBi is more than or equal to 70 degrees.
Drawings
Fig. 1 is a schematic structural diagram of a broadband directional panel antenna of a crab claw-shaped vibrator according to the present invention;
FIG. 2 is a schematic diagram of a crab claw vibrator printing plate of the invention;
FIG. 3 is a schematic view of the connection structure of the arcuate bent reflecting plate and the feed coaxial assembly part of the present invention;
FIG. 4 is a diagram of simulation results of a voltage standing wave ratio curve in an embodiment of the present invention;
FIG. 5 is a graph of simulation results of gain curves in an embodiment of the present invention;
FIG. 6 is an H-plane pattern (0.6 GHz, 2GHz, 3.3GHz frequency points) in an embodiment of the invention;
the reference numerals in the drawings illustrate: 1 is a crab claw-shaped vibrator printing plate; 11 is a first crab claw vibrator; 12 is a second crab claw vibrator; 13 is a printed PCB;2 is a feed balun component; 21 is a feed coaxial line assembly; 22 is a 1/4 wavelength short circuit branch; 23 is a feeding sheet; 3 is an arched bending reflecting plate; 4 is a parasitic element; 5 is a parasitic unit support column; and 6 is a tuning post.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 3, the broadband directional panel antenna of the crab claw-shaped vibrator of the present application includes a crab claw-shaped vibrator printed board 1, a feed balun component 2, an arcuate bending reflecting board 3, a parasitic unit 4, a parasitic unit support column 5, and a tuning column 6.
The crab claw-shaped vibrator printing plate 1 has the dimensions of 155mm long and 80mm wide, and is printed with two vibrators with dimensions of 72mm long and 60mm wide, namely a first crab claw vibrator 11 and a second crab claw vibrator 12, which are symmetrical about the center, and the gap is 3mm; triangle with 8mm multiplied by 16mm of cutting angle size of the center parts of the two symmetrical crab claw-shaped vibrators; arc-shaped chamfer angles at two ends of the two crab claw-shaped vibrators are arcs with the side length of 25 mm; the parameters of the cut ellipse were a=80 mm, b=32 mm, and the ellipse center position a was (55 mm,0 mm).
The feed balun component 2 comprises a feed coaxial line component 21, a 1/4 wavelength short circuit branch 22 and a feed piece 23, wherein the feed coaxial line component 21 and the 1/4 wavelength short circuit branch 22 are arranged on a middle bending bulge of the arched bending reflecting plate 3, and the feed coaxial line component 21 passes through the second crab claw vibrator 12 and the 1/4 wavelength short circuit branch 22 passes through the first crab claw vibrator 11; the center distance between the 1/4 wavelength short circuit branch 21 and the feeding coaxial line assembly 22 is Ds1 = 12mm, and the center distance is equal to the feeding opening distance on the crab claw-shaped vibrator printing plate 1; the feeding sheet 23 is above the crab claw-shaped vibrator printing plate 1 and is of a metal sheet structure, and two ends of the feeding sheet are respectively and electrically connected with the tail ends of the 1/4-wavelength short circuit branches 21 and the tail ends of core wires of the feeding coaxial line assembly 22.
The projection size of the arched bending reflecting plate 3 in the X-Y direction after bending is 155mm long and 80mm wide as that of the crab-claw vibrator printing plate 1, the height of the bending vertical part is D1=42 mm, the length of the middle concave bending part on the bottom surface is L2=50 mm, the length of the middle concave bending part on the top is L1=22 mm, and the height of the concave bending part is D3=12 mm.
The parasitic element 4 is a square metal plate with a side length of 56mm, and is positioned right above the crab claw-shaped vibrator printing plate 1 and is away from Hp=20 mm above the crab claw-shaped vibrator printing plate 1.
The parasitic element support columns 5 are 4 nonmetallic columns which are symmetrically distributed in square, the height of each nonmetallic column is hp=20mm, the diameter of each nonmetallic column is 6mm, and the distance between every two adjacent nonmetallic columns is 40mm.
The tuning posts 6 are 2 symmetrically distributed metal posts with the diameter of 10mm, the height of the tuning posts is D1=42 mm, the tuning posts are arranged on the arched bending reflecting plate 3, and the space between the two metal posts is DS 2=110 mm; screw holes are formed in the bottom end and the top end of the metal column, and the metal column is fixed on the arched bending reflecting plate 3 through screws and is connected with the crab claw-shaped vibrator printing plate 1.
The crab claw-shaped vibrator broadband directional panel antenna is simulated by electromagnetic simulation software, and simulation results shown in figures 4-6 are obtained.
Referring to fig. 4, the provided crab claw vibrator broadband directional panel antenna has a standing wave ratio of less than 2.5 in 0.6GHz to 4.2GHz, and the bandwidth reaches 7:1 octave, relative bandwidth 150%.
Referring to FIG. 5, the provided crab claw vibrator broadband directional panel antenna has gains of more than or equal to 4dBi in 0.6GHz to 3.3GHz, the gain range is 4-8 dBi, and the bandwidth reaches 5.5:1 octave, relative bandwidth 138.5%, no lobe of in-band pattern.
Referring to fig. 6, the beam width of the crab claw-shaped vibrator broadband directional antenna provided in the directional diagram non-lobe bandwidth is equal to or more than 70 degrees.
The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application. The present application is susceptible to various modifications and alternative forms, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application are intended to be included within the scope of the present application.
Claims (8)
1. A wideband directional panel antenna for a crab claw vibrator, comprising: crab claw-shaped vibrator printing plate, feed balun component, bow-shaped bending reflecting plate, parasitic unit support column and tuning column;
the crab claw-shaped vibrator printing plate is a printed PCB, two vibrator pieces with outward crab claw directions are printed on the printed PCB, a vibrator with the left side connected with the short circuit branch is called a first crab claw-shaped vibrator, and a vibrator with the right side connected with the feed coaxial assembly is called a second crab claw-shaped vibrator; triangular chamfer angles are arranged at the positions of each crab claw-shaped oscillator close to the center, and the two crab claw-shaped oscillators are symmetrical about the center of the antenna axis and keep a certain gap; the distance between the crab claw-shaped vibrator and the top of the arched bending section of the arched bending reflecting plate is smaller than the distance between the crab claw-shaped vibrator and the horizontal transition section of the arched bending reflecting plate;
the feed balun component comprises a feed coaxial component, a short circuit branch and a feed sheet, wherein the feed coaxial component is a cable component with a radio frequency cable, the short circuit branch is a section of metal connecting piece, and the feed sheet is positioned above the crab-claw-shaped vibrator printing plate and is used for connecting the short circuit branch and the tail end of the feed coaxial component; the starting end of the feed coaxial assembly is a radio frequency connector, the tail end of the feed coaxial assembly passes through the arched bending reflecting plate and then passes through the crab claw-shaped vibrator printing plate again, and the coaxial outer conductor of the feed coaxial assembly is electrically connected with a crab claw-shaped vibrator; the short circuit branch is electrically connected with the arched bending reflecting plate and the other crab claw-shaped vibrator; one side of the feed piece is electrically connected with the tail end of the short circuit branch knot, and the other side of the feed piece is electrically connected with the tail end core wire of the feed coaxial assembly;
the arched bending reflecting plate is a bending metal plate, the bottom of the arched bending reflecting plate is of a convex structure, and the vertical flanging parts on two sides of the arched bending reflecting plate are vertical to the bottom surface; the bottom bulge structure of the arched bending reflecting plate is provided with a feeding coaxial assembly of a feeding balun assembly and a short circuit branch knot, the horizontal transition section is provided with a tuning column, and the vertical flanging parts at two sides support the crab-claw-shaped vibrator printing plate;
the parasitic unit is a rectangular metal plate, is positioned right above the crab-claw-shaped vibrator printing plate and is fixed on the crab-claw-shaped vibrator printing plate through a parasitic unit support column;
the parasitic unit support columns are 4 nonmetallic cylinders which are arranged on the crab claw-shaped vibrator printing plate and are used for fixing and supporting the parasitic units;
the tuning column is 2 metal columns and is positioned between the arched bending reflecting plate and the crab-claw-shaped vibrator printing plate, the bottom of the tuning column is arranged on the horizontal transition section of the arched bending reflecting plate, and the top of the tuning column supports the crab-claw-shaped vibrator printing plate.
2. The wideband directional planar antenna of crab claw vibrator according to claim 1, wherein the short circuit branch is electrically connected to the inner side of the first crab claw vibrator, and the short circuit branch is 1/4 wavelength; the coaxial line sheath of the feed coaxial assembly is electrically connected with the position, close to the inner side, of the second crab claw-shaped vibrator, the core wire of the feed coaxial assembly is electrically connected with the tail end of a short circuit branch joint penetrating through the first crab claw-shaped vibrator through a feed piece, 0-180-degree feed of the two crab claw-shaped vibrators is formed, the feed position of the first crab claw-shaped vibrator is short-circuited with the ground through the short circuit branch joint, a balanced feed structure is formed, and deflection of an antenna radiation pattern caused by unbalance of current of the coaxial line part of the feed coaxial assembly is avoided.
3. The wideband directional patch antenna of claim 1, wherein said parasitic element is located directly above the crab claw vibrator printed board for extending the impedance and pattern bandwidth of the directional patch antenna.
4. The wideband directional planar antenna of crab claw-shaped vibrator according to claim 1, wherein the crab claw-shaped vibrator printed board has electromagnetic coupling between the ends of the crab claw-shaped vibrator and the vertical folded parts on both sides of the arched bent reflecting plate, and the low-frequency impedance matching characteristic is adjusted by adjusting the distance between the ends of the crab claw-shaped vibrator and the vertical folded parts on both sides of the arched bent reflecting plate.
5. The wideband directional planar antenna of a crab claw vibrator according to claim 1, wherein the middle crab claw of the printed crab claw vibrator on the crab claw vibrator printing plate is elliptical, and the equation expression is:
wherein, (x) 0 ，y 0 ) Is elliptical centerThe coordinates of point A, which usually holds y 0 =0 such that the center point is located on the central symmetry line of the monolithic printed crab claw vibrator, passing through x 0 The value change of (2) enables the ellipse to be cut to move left and right; a is the axial length of the ellipse in the x-axis direction, and b is the axial length of the ellipse in the y-axis direction.
6. The broadband directional panel antenna of the crab claw vibrator according to claim 1, wherein two tuning posts are further arranged between the crab claw vibrator printed board and the arched bending reflecting board, the centers of the tuning posts are positioned near a point A of a center position of a crab claw cutting ellipse, and the diameter and the position parameters of the tuning posts can be adjusted for adjusting the impedance matching characteristic of a second resonance point of a low-frequency position.
7. The broadband directional panel antenna of the crab claw vibrator according to claim 1, wherein a vertical distance D1 from a center position of the crab claw vibrator printed board to a bottom of the arched bent reflecting board is smaller than a vertical distance D2 from the crab claw vibrator printed board to a horizontal transition section, and the broadband directional panel antenna is mainly used for adjusting impedance matching of a high frequency band and widening a high frequency beam width.
8. The wideband directional panel antenna of crab claw shaped vibrator according to claim 1, wherein triangular cutting angles are performed at the positions of the two crab claw shaped vibrators close to the middle, and the triangular cutting angles are used for adjusting impedance matching of a high frequency band.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105126A (en) * | 1985-07-23 | 1987-04-29 | 索尼公司 | Microwave antenna |
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| Publication number | Publication date |
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| CN115411517A (en) | 2022-11-29 |
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